new york ap somali pirates attacked damaged american ship carrying humanitarian aid ship crew safe navy escort u s central command spokesman says liberty sun reported attacked 11 30 m edt tuesday vessel owner lake success n y based liberty maritime corp says pirates fired rocket propelled grenades automatic weapons ship en route houston mombasa kenya military spokesman navy capt jack hanzlik says liberty sun crew 20 says uss bainbridge sailed scene reported arriving 5 30 p m edt pirates left injuries liberty sun continuing way mombasa copyright 2009 associated press rights reserved material published broadcast rewritten redistributed